55990799 has 2 divisors, whose sum is σ = 55990800. Its totient is φ = 55990798.

The previous prime is 55990787. The next prime is 55990801. The reversal of 55990799 is 99709955.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55990799 is a prime.

Together with 55990801, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55990799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55990199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27995399 + 27995400.

It is an arithmetic number, because the mean of its divisors is an integer number (27995400).

Almost surely, 2^55990799 is an apocalyptic number.

55990799 is a deficient number, since it is larger than the sum of its proper divisors (1).

55990799 is an equidigital number, since it uses as much as digits as its factorization.

55990799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 55990799 is about 7482.6999806220. The cubic root of 55990799 is about 382.5652819785.

The spelling of 55990799 in words is "fifty-five million, nine hundred ninety thousand, seven hundred ninety-nine".